Nginx configuration example(without virtual hosts yet), come here to see the annotation: http://gist.github.com/265368

nginx.conf

user  www-data www-data;
worker_processes  4;

events {
    use epoll;
    worker_connections  8000;
}

http {
    server_names_hash_bucket_size 64;
    
    passenger_root  /opt/ruby-enterprise-1.8.7-2010.01/lib/ruby/gems/1.8/gems/passenger-2.2.9;
    passenger_ruby  /opt/ruby-enterprise-1.8.7-2010.01/bin/ruby;
    
    include         mime.types;
    default_type    application/octet-stream;
    
    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     off;
    
    keepalive_timeout  15;
    
    gzip            on;
    gzip_min_length 1000;
    gzip_comp_level 8;
    gzip_proxied    any;
    gzip_types      text/plain text/css text/javascript text/xml application/x-javascript application/xml application/xml+rss;
    
    include /opt/nginx/sites-enabled/*;
}